Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1975_135_a22, author = {K. Pohlmeyer}, title = {Higher order perturbation theory of exponential {Lagrangians:} fourth order}, journal = {Informatics and Automation}, pages = {201--205}, publisher = {mathdoc}, volume = {135}, year = {1975}, language = {en}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1975_135_a22/} }
K. Pohlmeyer. Higher order perturbation theory of exponential Lagrangians: fourth order. Informatics and Automation, International Conference on Mathematical Problems of Quantum Field Theory and Quantum Statistics. Part I. Axiomatic quantum field theory, Tome 135 (1975), pp. 201-205. http://geodesic.mathdoc.fr/item/TRSPY_1975_135_a22/